The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1992
Filed:
Oct. 05, 1990
Nobuyasu Ando, Takasaki, JP;
Sanden Corporation, , JP;
Abstract
A heat exchanger includes a serpentine tube, a plurality of fins provided on the sides of the tube, and unions into which the respective end portions of the tube are inserted and to which the end portions are brazed. An expanded portion is formed on the tip of each inserted end portion of the tube, and a corresponding engaging portion is provided in each union. The expanded portion is engaged with the engaging portion of the union. Since the end portion of the tube is temporarily fixed to the union by the engagement of the expanded portion with the engaging portion, it is possible to simultaneously braze the tube to the union, and the tube to the fins, in a furnace. The manufacturing process of the heat exchanger can be simplified, the efficiency of the brazing process is increased, and the quality of the brazed portion is consistently high.